SharePoint 2016 @ Imcompatibilities with Internet Explorer (document mode=11)

Hi! It’s a double feature to open this once in new tab and next time in same page? Pls check the library settings -Advanced: du you have Folders? Where is your pdf to open? Is it saved in a folder? Folders are sometimes not visible in modern views. Next question: maybe your pdf admin is a link, you can see it on the library page (edit page): go to the link tab in the ribbon above. Maybe your pdf folder is also linked with option „ show it in new page“ (classic layout) . I suggest your admin should go to central administration and in „settings“ there it can be centrally changed to „modern experience“. Hope that helps, Greets from Eva